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Does anyone using ntcascwe3103f ?

kumarr123

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Hi,
I want to use ntcascwe3103f sensor. but I don't know how I do programming for this sensor, what shoud be the parameter, what should be the resistance and analog value.
Does anyone have any clue? guide us

Regards,
Kumar
 
Hi,

the device ... no surprise ... comes with a datasheet. It tells all you need to know. Often the manufacturer provides additional informations. Just visit their web site.

The sensor can´t be programmed. It is a simple NTC. An analog passive device.

Klaus
 
Last edited:
Hello,

You are facing with 2 main problems
- take care of
*input impedance of ADC
* big no linearity on High and Low temperatures
so CTN must be used in a short scale to avoid this probleme
ie : 10°C to 60°C
With your NTC you can trace the response curve Rctn = f(Temperature)
How to mesure the resistance ..
By appling constant current of 500µA (as on the schematic)
You get volt accross CTN ..but disturbed by ADC impedance input ( <= 100K on most PIC)
with the Equation y=-0.0398 x3 +8.4414 * X2 -598.97*X +15180
result affected by error of polynomiale calculus, and effect of ADC impedance input

Maybe, you could Use another way as analog ...
Time measurement :
ie : Monotstable duration By CTN + fixed capacitor
or frequency mesurement
Frequency by oscillateur f= 1/(2*PI*R*C) R=CTN + C fix capacitor (NE555 CMOS version)

a old subjetc on CTN measurement with a PC computer
but could be updated with Microcontroller
 

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  • CTN_ ntcascwe3103f_response.jpg
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Last edited:
Hi,
I want to use ntcascwe3103f sensor. but I don't know how I do programming for this sensor, what shoud be the parameter, what should be the resistance and analog value.
Does anyone have any clue? guide us

Regards,
Kumar
Your duty is to define expectations for calibration and tolerance errors for your undefined transfer function for thermal sensing including time delay and sensor location errors. So pls. provide all error specs. for offset, linearity, range, time constant and target object.
 

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